.fill {
    flex: 1;
    text-align: center;
}

.header-container {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
    align-content: center;
    width: 100%;
}

.material-icon {
    line-height: 1;
}